# Implementation summary — AN-39

**Design:** Account Customer Tier Classification

## Files written
- `force-app/main/default/objects/Account/fields/Customer_Tier__c.field-meta.xml`
- `force-app/main/default/objects/Account/validationRules/Prevent_Manual_Customer_Tier_Edit.validationRule-meta.xml`
- `force-app/main/default/flows/Account_Customer_Tier_Auto_Assign.flow-meta.xml`
- `force-app/main/default/permissionsets/Account_Customer_Tier_Visibility.permissionset-meta.xml`
- `force-app/main/default/lwc/accountSummary/accountSummary.html`
- `force-app/main/default/lwc/accountSummary/accountSummary.js`
- `force-app/main/default/lwc/accountSummary/accountSummary.js-meta.xml`

## Acceptance criteria

- When an Account is created or its Annual Revenue changes, the Customer Tier field is automatically set according to the provided revenue-to-tier mapping.
- Users cannot manually edit the Customer Tier field.
- The Customer Tier field is visible on the Account Lightning Record Page.
- Existing Accounts can be backfilled with the correct Customer Tier based on current Annual Revenue.